Found with PFGW Version 3.8.0

8600^13481-13481^8600 is 2-PRP! (55.9254s+0.0099s)
8600^13481-13481^8600 is 3-PRP! (60.6698s+0.0111s)
8600^13481-13481^8600 is 5-PRP! (53.1811s+0.0098s)
8600^13481-13481^8600 is 7-PRP! (55.2610s+0.0134s)
8600^13481-13481^8600 is 11-PRP! (54.5430s+0.0105s)

Primality testing 8600^13481-13481^8600 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 7, base 9+sqrt(7)
Calling N+1 BLS with factored part 0.03% and helper 0.00% (0.09% proof)
8600^13481-13481^8600 is Fermat and Lucas PRP! (292.5490s+0.0127s)

To be completed...